I wondering how to compute DOM and HTTP load from a HAR file.
I'm a bit confuse with my HAR file results.
The values found in the pagetiming is different from what is shown if I open the file in HTTPWatch Studio
Pagetimings:
The HTTP Load time in HttpWatch is the total elapsed time from when the page started loading until the completion of the last HTTP/HTTPS request. It's not a standard timing value in the HAR file specification and is calculated by looking at each request for a given page.
The -1 values (e.g. for onLoad in your HAR file) indicate that that there was no timing value for that event.
The onContentLoad event in the HAR file is the same as the DOM Load event shown in HttpWatch.
More information about the page event timings in HttpWatch is available here:
https://help.httpwatch.com/time_chart.html
Related
I've got a working local website that takes in HTML form data.
The fields are:
Temperature
Humidity
The server successfully receives the data and spits out a graph updated with the new entries.
Using a browser tool, I was able to capture the actual POST request as follows:
http://127.0.0.1:5000/add_data
Temperature=25.4&Humidity=52.2
Content-Length:30
Now, I want to migrate from using the human interface browser with manual entries to an ESP01 device using AT commands.
According to the ESP AT-commands documentation, a POST request is performed using the following command:
AT+HTTPCPOST=
Find the link below for the full description of the command.
I cannot seem to get this POST request working. The ESP01 device immediately returns an "ERROR" message without any delay, as though it did not even try to send the request, that the syntax might be wrong.
Among many variations, the following is my best attempt:
AT+HTTPCPOST="http://MYIPADDR:5000/add_data",30,2,"Temperature: 25.4","Humidity: 52.2"
With MYIPADDR above replaced with my IP address.
How do I translate a post request into ESP01 AT command format, and are there any prerequisites needed to be in place to perform such a request?
I did connect the ESP01 device to the WiFi network.
Here's the link to the POST AT command description:
https://docs.espressif.com/projects/esp-at/en/release-v2.2.0.0_esp8266/AT_Command_Set/HTTP_AT_Commands.html#cmd-httpcpost
The documentation says:
AT+HTTPCPOST=url,length[,<http_req_header_cnt>][,<http_req_header>..<http_req_header>]
Response:
OK
The symbol > indicates that AT is ready for receiving serial data, and you can enter the data now. When the requirement of message length
determined by the parameter is met, the transmission starts.
...
Parameters
: HTTP URL. : HTTP data length to POST. The maximum
length is equal to the system allocable heap size.
<http_req_header_cnt>: the number of <http_req_header> parameters.
[<http_req_header>]: you can send more than one request header to the
server.
You're sending:
AT+HTTPCPOST="http://MYIPADDR:5000/add_data",30,2,"Temperature: 25.4","Humidity: 52.2"
The length is 30. The problem is that everything after the length is HTTP header fields; you need to send the variables in the body. So the command is:
AT+HTTPCPOST="http://MYIPADDR:5000/add_data",30
followed on the next line by after the ESP-01 send the > character:
Temperature=25.4&Humidity=52.2
Because you passed 30 as the body length, the ESP-01 will read exactly 30 characters after the end of the AT command and send that data as the post body. If the size of that data changes (for instance, maybe the temperature is 2.2, so one digit less), you'll need to send the new length rather than 30.
I have a Golang web server that I have written to handle large file uploads 30GB or more. In a proof of concept using Dropzone.js I can upload files of any size with no issue as long as they are chunked.
The way DropzoneJS.js implemented this is that each chunk has items added the to the header like:
dzchunkindex: 435
dzchunksize: 10000
dztotalchunkcount: 3498274
So I receive a chunk, I create the file (if needed), write the data, and check to see if I'm on the last chunk. Then repeat as needed. Once I see I've written the last chunk I close the file.
It seems like Alamofire supports chunked uploads using its AF.Upload method.
However, how should my server know when the last chunk has been uploaded? I can certainly check this a different way. Just curious what that way should be? Ive combed over the Alamofire docs and can't find much.
I can chunk the file manually and upload it but id rather use Alamofire if possible.
Thanks,
Ed
I need to save a session in HAR or SAZ formats. If I use fiddler to do it now I have all the requests and responses. Id like to limit things to request and response to html document only or to json response or any resource I need. Is there a way to do this in fiddler?
To save a single Request/Response pair in a SAZ file, select it and choose File > Save > Selected Sessions > In ArchiveZip.
To save a single Request/Response pair in a HAR file, select it and choose File > Export Sessions > Selected Sessions.
To do this from script or an extension, simply call the WriteSessionArchive method, passing an array containing just 1 Session object.
I do this:
Press F12 to stop capture
Delete any of the traffic you don't want.
File - Save All Sessions.
This enables me to save a .saz file with only 1 request/response inside. I hope they fix this so you can choose to do this under save selected sessions.
OK, here's a goal I've been looking for a while.
As it's known, most advertising and analytics companies use a so called "pixel" code in order to track websites views, transactions, conversion etc.
I do have a general idea on how it works, the problem is how to implement it. The tracking codes consist from few parts.
The tracking code itself.
This is the code that the users inserts on his webpage in the <head> section. The main goal of this code is to set some customer specific variables and to call the *.js file.
*.js file.
This file holds all the magic of CRUD (create/read/update/delete) cookies, track user's events and interaction with the webpage.
The pixel code.
This is an <img> tag with the src atribute pointing to an image *.gif (for example) file that takes all the parameters collected on the page, and stores them in the database.
Example:
WordPress pixel code: <img id="wpstats" src="http://stats.wordpress.com/g.gif?host=www.hostname.com&list_of_cookies_value_pairs;" alt="">
Google Analitycs:
http://www.google-analytics.com/__utm.gif?utmwv=4&utmn=769876874&etc
Now, it's obvious that the *.gif request has to reach a server side scripting language in order to read the parameters data and store them in a db.
Does anyone have an idea how to implement this in Zend?
UPDATE
Another thing I'm interested in is: How to avoid the user's browser to load the cached *.gif ? Will a random parameter value do the trick? Example: src="pixel.gif?nocache=random_number" where the nocache parameter value will be different on every request.
As Zend is built using PHP, it might be worth reading the following question and answer: Developing a tracking pixel.
In addition to this answer and as you're looking for a way of avoiding caching the tracking image, the easiest way of doing this is to append a unique/random string to it, which is generated at runtime.
For example, server-side and with the creation of each image, you might add a random URL id:
<?php
// Generate random id of min/max length
$rand_id = rand(8, 8);
// Echo the image and append a random string
echo "<img src='pixel.php?a=".$vara."&b=".$varb."&rand=".$rand_id."'>";
?>
Just adding my 2 cents to this thread because I think an important, and frequently used, option is missing: you don't necessarily need a scripting language to capture the request. A more efficient approach is to use the web server access log (like apache access log for instance) to log the request and then handle that log with whatever tools you see fit, like ELK stack for instance.
This makes serving the requests much lighter because no scripting language is loaded to prepare the response, just native apache response, which is typically much more efficient.
First of all, the *.gif doesn't need to be that file type, the only thing that is of interest is the Content-Type http header. Set that to image/gif (or any other, appropiate type) in the beginning, execute your code and render some sort of image to the response body.
Well, all of the above codes are correct and is good but to be certain, the guy above mention "g.gif"
You can just add a simple php code to write to an sql or fwrite("file.txt",$opened)
where var $opened serves as the counter++ if someone opened your mail... then save it as "g.gif"
TO DO all of this just add these:
<Files "/thisdirectory">
AddType application/x-httpd-php .gif
</Files>
to your ".htaccess" file but be sure to make a new directory for that g.gif or whatever.gif where the directory only contains g.gif and .htaccess
I want to download a large file (> 500MB) to my application from the server. I used NSURLConnection, that works well if the network is very good. but sometimes I tried to download 500MB file, but 200MB or 100MB only downloaded if the network is not very good.That means I got the connectionDidFinishLoading method when the task was not completed.Someone says set a timeout second to avoid this situation，but i set timeout second 30s，it did not work.Should I set 60s or more？ Does someone have better idea,please help me.
in connectionDidFinishLoading method every time check the length of data to download and the downloaded data.
length of the data to be download is gain by this [response expectedContentLength]; in didReceiveResponse method
You should download such big file in parts. Specify the Content-Range field in the header of your HTTP request and ask only for a small portion of the file at once. When you get all portions, you can assemble the file together.
You can set HTTP headers with NSMutableURLRequest setValue:#"0-1023/*" forHTTPHeaderField:#"Content-Range"];, this example downloads only the first kbyte of the file. See also Content-Range in http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html